Miosiren is an extinct genus of manatee from the Early Miocene of southeastern England (Suffolk) and Antwerp, Belgium.[1] Two species are recognized, M. canhami and M. kocki.
A 2014 cladistic analysis of extinct sirenians recovered Miosiren as a close relative of Anomotherium in a separate subfamily within Trichechidae, Miosireninae.[2]